On the Theoretical Prerequisites for Application of Novel Materials in Promising Energy Systems

Barsukov, V.; Doninger, Joseph E.

doi:10.1007/1-4020-4812-2_23

Cited by 7 publications

(9 citation statements)

References 5 publications

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“…The quick decrease in specific capacitances may be due to the dissolution of Mn oxide. 50 Although the specific capacitance of the Mn oxide component decreased with cycling, the specific capacitance of the composite remained significantly higher than that for the CF alone and the specific capacitance of the Mn oxide component was still ca. 450 F/g after 150 cycles.…”

Section: A246mentioning

confidence: 94%

Carbon Fabric Supported Manganese and Ruthenium Oxide Thin Films for Supercapacitors

Liu

Pickup

2011

J. Electrochem. Soc.

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Ru oxide/carbon fabric ͑CF͒, Mn oxide/CF, and binary Mn-Ru oxide/CF composites were prepared by reactions between the reductive functional groups on the CF and Ru͑VI͒, Ru͑VII͒, Mn͑VII͒, and Ru͑VII͒ + Mn͑VII͒ mixtures, which resulted in spontaneous deposition of the metal oxides as thin films on the carbon fiber surfaces. Capacitances, resistances, stabilities, and power versus energy densities were measured in acidic ͑Ru oxide/CF͒, neutral ͑Mn oxide/CF͒, and basic ͑all composites͒ electrolytes. A maximum average specific capacitance of 824 Ϯ 152 F/g was obtained for the Ru oxide component of a 7.4% Ru oxide/CF composite in 1 M H 2 SO 4 . Mn oxide/CF composites exhibited specific capacitances in bases that were greater than 1000 F/g for the Mn oxide component, but not stable to cycling. The mixed Mn-Ru oxide/CF composites were significantly more stable and also exhibited very high specific capacitances for the oxide component.

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Section: A246mentioning

confidence: 94%

Carbon Fabric Supported Manganese and Ruthenium Oxide Thin Films for Supercapacitors

Liu

Pickup

2011

J. Electrochem. Soc.

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“…The Н value may be provisionally determined on the basis of the literature on activated carbons [38]: l ~ 1/ s  , where  is the carbon density in activated carbons.  ~ 2 g/cm 3 . Assuming that s = 10 7 cm 2 /g, l ~ 0.5 nm.…”

Section: H H H H H Hmentioning

confidence: 99%

Studies of Supercapacitor Carbon Electrodes with High Pseudocapacitance

Volfkovich¹,

Mikhailin²,

Bograchev³

et al. 2012

Recent Trend in Electrochemical Science and Technology

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“…As a consequence, supercapacitors have a much higher charge and discharge rate and can survive many more cycles than batteries. Thus, supercapacitors provide a much greater power density, but they are still not able to store the same amount of energy as the bestperforming batteries, such as Li-ion [1][2][3] . In the last years, tremendous research efforts have been devoted to increasing the energy density of supercapacitors while maintaining their high power capability and their long cycling life [4][5][6] .…”

Section: Introductionmentioning

confidence: 99%

Ion-ion correlations across and between electrified graphene layers

Méndez-Morales

Burbano

Haefele

et al. 2018

The Journal of Chemical Physics

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When an ionic liquid adsorbs onto a porous electrode, its ionic arrangement is deeply modified due to a screening of the Coulombic interactions by the metallic surface and by the confinement imposed upon it by the electrode's morphology. In particular, ions of the same charge can approach at close contact, leading to the formation of a superionic state. The impact of an electrified surface placed between two liquid phases is much less understood. Here we simulate a full supercapacitor made of the 1-butyl-3-methylimidazolium hexafluorophosphate and nanoporous graphene electrodes, with varying distances between the graphene sheets. The electrodes are held at constant potential by allowing the carbon charges to fluctuate. Under strong confinement conditions, we show that ions of the same charge tend to adsorb in front of each other across the graphene plane. These correlations are allowed by the formation of a highly localized image charge on the carbon atoms between the ions. They are suppressed in larger pores, when the liquid adopts a bilayer structure between the graphene sheets. These effects are qualitatively similar to the recent templating effects which have been reported during the growth of nanocrystals on a graphene substrate.

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On the Theoretical Prerequisites for Application of Novel Materials in Promising Energy Systems

Cited by 7 publications

References 5 publications

Carbon Fabric Supported Manganese and Ruthenium Oxide Thin Films for Supercapacitors

Carbon Fabric Supported Manganese and Ruthenium Oxide Thin Films for Supercapacitors

Studies of Supercapacitor Carbon Electrodes with High Pseudocapacitance

Ion-ion correlations across and between electrified graphene layers

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